Chairback



FIG. 1 is a front, elevational view of the chairback of the present invention;

FIG. 2 is a top, plan view of the chairback of the present invention;

FIG. 3 is a bottom, plan view of the chairback of the present invention;

FIG. 4 is a left side, elevational view of the chairback of the present invention;

FIG. 5 is a right side, elevational view of the chairback of the present invention; and,

FIG. 6 is a rear, elevational view of the chairback of the present invention. 

The ornamental design for a chairback, as shown and described. 